Circular Knitting
Loop length is not a setting you choose. It is a window the yarn count opens.
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Square root of tex divided by loop length in mm
The tight and slack limits are properties of the fibre, the yarn quality and the machine gauge rather than universal constants; the defaults reflect cotton single jersey on a medium gauge and should be re-established for other fibres. Fabric weight is calculated at the stitch density entered, which for a greige fabric on the machine is not the density it will have after relaxation, wet processing or compacting - expect the finished figure to be substantially higher, driven almost entirely by stitch density rather than by loop length. Needle count is the geometric figure from gauge and diameter and ignores any needles removed for a pattern. Yarn consumption assumes every feeder knits every revolution and makes no allowance for machine efficiency, waste at start-up or the extra yarn taken by elastane or plating feeders. This is a single jersey model: rib, interlock and purl consume differently per course and their tightness factors are conventionally quoted on a different basis.
Stitch Cam Setting Window, Tightness Factor & Fabric Weight — free, with the formula and a worked example, at Textile School.